JP2714591B2 - Thermal recording material - Google Patents
Thermal recording materialInfo
- Publication number
- JP2714591B2 JP2714591B2 JP63012197A JP1219788A JP2714591B2 JP 2714591 B2 JP2714591 B2 JP 2714591B2 JP 63012197 A JP63012197 A JP 63012197A JP 1219788 A JP1219788 A JP 1219788A JP 2714591 B2 JP2714591 B2 JP 2714591B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- recording material
- solution
- methyl
- sensitive recording
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—Non-macromolecular compounds
- B41M5/3335—Compounds containing phenolic or carboxylic acid groups or metal salts thereof
- B41M5/3336—Sulfur compounds, e.g. sulfones, sulfides, sulfonamides
Description
【発明の詳細な説明】 〔技術分野〕 本発明は、感熱記録材料に関し、更に詳しくは常温に
おいて無色又はやや淡色のロイコ染料と該ロイコ染料に
対する顕色剤との発色反応を利用した感熱記録材料に関
する。Description: TECHNICAL FIELD The present invention relates to a thermosensitive recording material, and more particularly to a thermosensitive recording material utilizing a color-forming reaction between a colorless or slightly pale leuco dye at room temperature and a developer with respect to the leuco dye. About.
最近、情報の多様化並びに増大、省資源、無公害化等
の社会の要請に伴った情報記録分野においても種々の記
録材料が研究・開発され実用に供されている。中でも感
熱記録材料は、（１）単に加熱するだけで発色画像が記
録され煩雑な現像工程が不要であること、（２）比較的
簡単でコンパクトな装置を用いて製造できること、更に
得られた記録材料の取扱いが容易で維持費が安価である
こと、（３）支持体として紙が用いられる場合が多く、
この際には支持体コストが安価であるのみでなく、得ら
れた記録物の感触も普通紙に近いこと等の利点を有す
る。このため感熱記録材料はコンピューターのアウトプ
ット、電卓等のプリンター分野、医療計測用のレコーダ
ー分野、低速並びに高速ファクシミリ分野、自動券売機
分野、感熱複写分野等において広く用いられている。In recent years, various recording materials have been researched, developed, and put to practical use in the information recording field in response to social demands such as diversification and increase of information, resource saving, and non-pollution. Above all, the thermosensitive recording material is (1) that a color image is recorded only by heating and a complicated developing step is unnecessary, (2) that it can be manufactured using a relatively simple and compact device, and that the obtained recording is further improved. (3) paper is often used as a support, because the material is easy to handle and the maintenance cost is low.
In this case, not only the cost of the support is inexpensive, but also the obtained printed matter has an advantage that the feel of the printed matter is close to that of plain paper. For this reason, heat-sensitive recording materials are widely used in computer output, printers such as calculators, recorders for medical measurement, low-speed and high-speed facsimile, automatic ticket vending machines, and thermo-sensitive copying fields.
上記感熱記録材料は、通常、紙、合成紙又は合成樹脂
フィルム等の支持体上に、加熱によって発色反応を起し
得る発色成分含有の感熱発色層液を塗布・乾燥すること
により製造されており、このようにして得られた感熱記
録材料は熱ペン又は熱ヘッドで加熱することにより発色
画像が記録される。The thermosensitive recording material is usually manufactured by coating and drying a thermosensitive coloring layer liquid containing a coloring component capable of causing a coloring reaction by heating on a support such as paper, synthetic paper or a synthetic resin film. The thus-obtained thermosensitive recording material is heated by a hot pen or a hot head to record a color image.
このような感熱記録材料の従来例としては、例えば特
公昭43−4160号公報又は特公昭45−14039号公報開示の
感熱記録材料が挙げられるが、このような従来の感熱記
録材料は、例えば熱応答性が低く、高速記録の際十分な
発色濃度が得られなかった。As a conventional example of such a heat-sensitive recording material, there is, for example, a heat-sensitive recording material disclosed in Japanese Patent Publication No. 43-4160 or Japanese Patent Publication No. 45-14039. Responsiveness was low, and sufficient color density was not obtained during high-speed recording.
かかる欠点を改善する方法として、ロイコ染料として
３−Ｎ−メチル−Ｎ−シクロヘキシルアミノ−６−メチ
ル−７−アニリノフルオランを用いる（特開昭49−1091
20号公報）、３−ジブチルアミノ−６−メチル−７−ア
ニリノフルオランを用いる（特開昭59−190891号公報）
などの高感度染料の開発がなされ、また顕色剤として、
発色性のよい物質1,7−ビス（４−ヒドロキシフェニル
チオ）−3,5−ジオキサへプタン（特開昭59−106456号
公報）、1,5−ビス（４−ヒドロキシフェニルチオ）−
３−オキサペンタン（特開昭59−116262号公報）を用い
ることにより高速化、高感度化を図る技術が開示されて
いる。また特開昭61−123584号公報、特開昭61−215087
号公報、特開昭61−242889号公報などにも前記で挙げた
物質を組合せての高速化・高感度化の試みがなされてい
る。As a method for remedying such a defect, 3-N-methyl-N-cyclohexylamino-6-methyl-7-anilinofluoran is used as a leuco dye (JP-A-49-1091).
No. 20) and using 3-dibutylamino-6-methyl-7-anilinofluoran (JP-A-59-190891).
And other high-sensitivity dyes.
Good color-forming substances 1,7-bis (4-hydroxyphenylthio) -3,5-dioxaheptane (JP-A-59-106456), 1,5-bis (4-hydroxyphenylthio)-
There is disclosed a technique for increasing the speed and sensitivity by using 3-oxapentane (JP-A-59-116262). JP-A-61-123584, JP-A-61-215087
Japanese Patent Application Laid-Open Publication No. 61-242889 and Japanese Patent Application Laid-Open No. 61-242889 also attempt to increase the speed and sensitivity by combining the above-mentioned substances.
しかしながら、これらの感熱記録材料は、高感度であ
るが、一般に高温下で保存すると地肌カブリを生じた
り、光に長時間さらされることにより地肌カブリを生じ
るなどの欠点が依然として残されている。However, although these heat-sensitive recording materials have high sensitivity, they generally still have disadvantages such as background fog when stored at high temperatures and background fog due to long-term exposure to light.
本発明の目的は、上記した従来の欠点を改善した感熱
記録材料を提供すること、即ち高感度でかつ熱や光に対
する保存性のよい感熱記録材料を提供することにある。An object of the present invention is to provide a heat-sensitive recording material in which the above-mentioned conventional disadvantages are improved, that is, to provide a heat-sensitive recording material having high sensitivity and good storage stability against heat and light.
本発明によれば、支持体上にロイコ染料と顕色剤とを
主成分とする発色層を設けた感熱記録材料において、ロ
イコ染料として下記（１）式で示される物質を、顕色剤
として下記（２）式で示される物質を用いることを特徴
とする感熱記録材料が提供される。According to the present invention, in a heat-sensitive recording material having a color-forming layer having a leuco dye and a color developer as main components on a support, a substance represented by the following formula (1) is used as a leuco dye and a color developer is used as a color developer. A heat-sensitive recording material characterized by using a substance represented by the following formula (2) is provided.
本発明は上記したロイコ染料と顕色剤を主たる成分と
して構成するものであるが、その他熱応答性をさらに高
める増感剤、画像の信頼性を向上させる助顕色剤、無機
及び有機の充填剤、界面活性剤及び支持体上に結合支持
させるための結合剤を必要に応じて適宜用いることがで
きる。 The present invention comprises the above-mentioned leuco dye and a color developer as main components, but further includes a sensitizer for further improving thermal responsiveness, an auxiliary color developer for improving image reliability, and inorganic and organic fillers. An agent, a surfactant, and a binder for binding and supporting on a support can be used as needed.
結合剤としては慣用の種々のものを用いることができ
るが、例えば、ポリビニルアルコール、ヒドロキシエチ
ルセルロース、カルボキシメチルセルロース、メチルセ
ルロース、エチルセルロース等のセルロース誘導体、ポ
リアクリル酸ソーダ、ポリビニルピロリドン、アクリル
酸アミド／アクリル酸エステル共重合体、アクリル酸ア
ミド／アクリル酸エステル／メタクリル酸３元共重合
体、スチレン／無水マレイン酸共重合体アルカリ塩、イ
ソブチレン／無水マレイン酸共重合体アルカリ塩、ポリ
アクリルアミド、アルギン酸ソーダ、ゼラチン、カゼイ
ン等の水性高分子の他、ポリ酢酸ビニル、ポリウレタ
ン、スチレン／ブタジエン共重合体、ポリアクリル酸、
ポリアクリル酸エステル、塩化ビニル／酢酸ビニル共重
合体、ポリブチルメタクリレート、エチレン／酢酸ビニ
ル共重合体、スチレン／ブタジエン／アクリル系共重合
体等のラテックスが挙げられる。Various conventional binders can be used, and examples thereof include cellulose derivatives such as polyvinyl alcohol, hydroxyethylcellulose, carboxymethylcellulose, methylcellulose, and ethylcellulose, sodium polyacrylate, polyvinylpyrrolidone, acrylamide / acrylate. Copolymers, acrylamide / acrylate / methacrylic acid terpolymer, styrene / maleic anhydride copolymer alkali salt, isobutylene / maleic anhydride copolymer alkali salt, polyacrylamide, sodium alginate, gelatin, In addition to aqueous polymers such as casein, polyvinyl acetate, polyurethane, styrene / butadiene copolymer, polyacrylic acid,
Latexes such as polyacrylate, vinyl chloride / vinyl acetate copolymer, polybutyl methacrylate, ethylene / vinyl acetate copolymer, and styrene / butadiene / acrylic copolymer are exemplified.
助顕色剤としては、従来公知の顕色剤である電子受容
性の種々の化合物、例えばフェノール性化合物、チオフ
ェノール性化合物、チオ尿素誘導体、有機酸及びその金
属塩等が挙げられるが、好ましくは以下に示す物質が有
効である。Examples of the auxiliary developer include various known electron-accepting compounds that are known developers, such as phenolic compounds, thiophenolic compounds, thiourea derivatives, organic acids and metal salts thereof, and are preferred. The following substances are effective.
4,4′−チオビス（６−tert−ブチル−２−メチル）
フェノール、2,2′−メチレンビス（４−メチル−６−t
ert−ブチルフェノール）、1,1,3−トリス（２−メチル
−４−ヒドロキシ−５−tertブチルフェニルブタン、1,
1,3−トリス（２−メチル−４−ヒドロキシ−５−シク
ロヘキシフェニル）ブタン、テトラブロモビスフェノー
ルＳ、ベヘン酸。4,4'-thiobis (6-tert-butyl-2-methyl)
Phenol, 2,2'-methylenebis (4-methyl-6-t
ert-butylphenol), 1,1,3-tris (2-methyl-4-hydroxy-5-tertbutylphenylbutane, 1,
1,3-Tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane, tetrabromobisphenol S, behenic acid.
充填剤としては、この種の感熱記録材料に慣用される
補助添加成分、例えば、炭酸カルシウム、シリカ、酸化
亜鉛、酸化チタン、水酸化アルミニウム、水酸化亜鉛、
硫酸バリウム、クレー、タルク、表面処理されたカルシ
ウムやシリカ等の無機系微粉末の他、尿素−ホルマリン
樹脂、スチレン／メタクリル酸共重合体、ポリスチレン
樹脂等の有機系の微粉末を挙げることができる。As the filler, auxiliary additives commonly used in this type of heat-sensitive recording material, for example, calcium carbonate, silica, zinc oxide, titanium oxide, aluminum hydroxide, zinc hydroxide,
In addition to inorganic fine powders such as barium sulfate, clay, talc, and surface-treated calcium and silica, organic fine powders such as urea-formalin resin, styrene / methacrylic acid copolymer, and polystyrene resin can be given. .
本発明の感熱記録材料は、例えば、前記した名成分を
含む感熱層形成用塗液を、紙、合成紙、プラスチックフ
ィルム等の支持体上に塗布・乾燥し、キャレンダー処理
することにより得られる。この場合、感熱発色層の下に
アンダーコート層、上にオーバーコート層を設けること
も可能である。The heat-sensitive recording material of the present invention can be obtained, for example, by applying and drying a coating solution for forming a heat-sensitive layer containing the above-mentioned components on a support such as paper, synthetic paper, or plastic film, and performing a calendering process. . In this case, it is also possible to provide an undercoat layer below the thermosensitive coloring layer and an overcoat layer above.
ロイコ染料、顕色剤、その他の補助添加剤の使用量
は、それぞれ５〜40重量％、20〜60重量％、20〜60重量
％が適当である。The appropriate amounts of the leuco dye, developer and other auxiliary additives are 5 to 40% by weight, 20 to 60% by weight, and 20 to 60% by weight, respectively.
本発明の感熱記録材料は、発色感度の向上されたもの
で、高速記録用として適すると共に、高温下及び耐光下
で保存しても地肌カブリのない極めて実用性の高いもの
である。The heat-sensitive recording material of the present invention has improved coloring sensitivity, is suitable for high-speed recording, and has extremely high practicality without background fog even when stored at high temperatures and under light resistance.
次に、本発明を実施例により更に詳細に説明するが、
本発明がこれらの例に限定されるものではない。尚、以
下に示す部及び％は、いずれも重量基準である。Next, the present invention will be described in more detail by examples,
The present invention is not limited to these examples. The parts and percentages shown below are based on weight.
実施例１ 下記組成の混合物をサンドミルを用いて２〜５時間粉
砕してそれぞれ〔Ａ〕液、〔Ｂ〕液を調整した。Example 1 A mixture having the following composition was pulverized using a sand mill for 2 to 5 hours to prepare a solution [A] and a solution [B], respectively.
〔Ａ〕液 ３−ジブチルアミノ−６−メチル−７−アニリノフル
オラン 20部 10％ポリビニルアルコール水溶液 20部 水 60部 〔Ｂ〕液 1,5−ビス（４−ヒドロキシフェニルチオ）−３−オ
キサペンタン 10部 炭酸カルシウム 10部 10％ポリビニルアルコール水溶液 20部 水 60部 次に〔Ａ〕液：〔Ｂ〕液＝1:8の割合で感熱塗布液を
調整し、坪量47g/m2の上質紙に乾燥塗布量が3.0g/m2に
なるように塗布・乾燥した後、キャレンダー処理して本
発明の感熱記録紙を得た。[A] solution 3-dibutylamino-6-methyl-7-anilinofluoran 20 parts 10% aqueous polyvinyl alcohol solution 20 parts water 60 parts [B] solution 1,5-bis (4-hydroxyphenylthio) -3- Oxapentane 10 parts Calcium carbonate 10 parts 10% polyvinyl alcohol aqueous solution 20 parts Water 60 parts Next, a heat-sensitive coating solution was prepared at a ratio of [A] solution: [B] solution = 1: 8, and a basis weight of 47 g / m 2 was obtained. After coating and drying on high-quality paper so that the dry coating amount was 3.0 g / m 2 , a calender treatment was performed to obtain a thermosensitive recording paper of the present invention.
実施例２ 実施例１と同様にして以下の〔Ｃ〕液を調整した。Example 2 The following solution [C] was prepared in the same manner as in Example 1.
〔Ｃ〕液 4,4−チオビス（６−tert−ブチル−２−メチル）フ
ェノール 20部 10％ポリビニルアルコール水溶液 20部 水 60部 〔Ａ〕液：〔Ｂ〕液：〔Ｃ〕液＝1:7:1の割合で感熱
塗布液を調整した以外は、実施例と同様にして本発明の
感熱記録紙を得た。[C] Solution 4,4-thiobis (6-tert-butyl-2-methyl) phenol 20 parts 10% aqueous polyvinyl alcohol solution 20 parts Water 60 parts [A] solution: [B] solution: [C] solution = 1: A heat-sensitive recording paper of the present invention was obtained in the same manner as in Example, except that the heat-sensitive coating solution was adjusted at a ratio of 7: 1.
実施例３ 実施例２において、〔Ｃ〕液の4,4′−チオビス（６
−tertブチル−２−メチル）フェノールの代わりに、2,
2′−メチレンビス（４−メチル−６−tert−ブチルフ
ェノール）を用いた以外は同様にして本発明の感熱記録
紙を得た。Example 3 In Example 2, 4,4'-thiobis (6
-Tertbutyl-2-methyl) phenol instead of 2,2
A heat-sensitive recording paper of the present invention was obtained in the same manner except that 2'-methylenebis (4-methyl-6-tert-butylphenol) was used.
実施例４ 実施例２において、〔Ｃ〕液の4,4′−チオビス（６
−tertブチル−２−メチル）フェノールの代わりに、1,
1,3−トリス（２−メチル−４−ヒドロキシ−５−tert
−ブチルフェノール）ブタンを用いた以外は同様にして
本発明の感熱記録紙を得た。Example 4 In Example 2, 4,4′-thiobis (6
-Tertbutyl-2-methyl) phenol instead of 1,
1,3-tris (2-methyl-4-hydroxy-5-tert
-Butyl phenol) butane was used in the same manner except that butane was used to obtain a thermosensitive recording paper of the present invention.
実施例５ 実施例２において、〔Ｃ〕液の4,4′−チオビス（６
−tertブチル−２−メチル）フェノールの代わりに、ベ
ヘン酸を用いた以外は同様にして本発明の感熱記録紙を
得た。Example 5 In Example 2, 4,4'-thiobis (6
A heat-sensitive recording paper of the present invention was obtained in the same manner except that behenic acid was used in place of -tertbutyl-2-methyl) phenol.
比較例１ 実施例１において〔Ａ〕液の３−ジブチルアミノ−６
−メチル−７−アニリノフルオランの代わりに、３−Ｎ
−メチル−Ｎ−シクロヘキシアミノ−６−メチル−７−
アニリノフルオランを用いた以外は実施例１と同様にし
て比較用の感熱記録紙を得た。Comparative Example 1 In Example 1, 3-dibutylamino-6 of solution [A] was used.
-Instead of methyl-7-anilinofluoran, 3-N
-Methyl-N-cyclohexamino-6-methyl-7-
A heat-sensitive recording paper for comparison was obtained in the same manner as in Example 1 except that anilinofluorane was used.
比較例２ 比較例１において〔Ｂ〕液の1,5−ビス（４−ヒドロ
キシフェニルチオ）−３−オキサペンタンの代わりにＰ
−ヒドロキシ安息香酸ベンジルを用いた以外は同様にし
て比較用の感熱記録紙を得た。Comparative Example 2 In Comparative Example 1, P was used instead of 1,5-bis (4-hydroxyphenylthio) -3-oxapentane in Solution [B].
A comparative thermosensitive recording paper was obtained in the same manner except that benzyl hydroxybenzoate was used.
比較例３ 実施例１において〔Ｂ〕液の1,5−ビス（４−ヒドロ
キシフェニルチオ）−３−オキサペンタンの代わりにＰ
−ヒドロキシ安息香酸ベンジルを用いた以外は同様にし
て比較用の感熱記録紙を得た。Comparative Example 3 In Example 1, P was used instead of 1,5-bis (4-hydroxyphenylthio) -3-oxapentane in the solution [B].
A comparative thermosensitive recording paper was obtained in the same manner except that benzyl hydroxybenzoate was used.
比較例４ 実施例１において〔Ｂ〕液の1,5−ビス（４−ヒドロ
キシフェニルチオ）−３−オキサペンタンの代わりに４
−イソプロポキシ−４′−ヒドロキシジフェニルスルホ
ンを用いた以外は同様にして比較用の感熱記録紙を得
た。Comparative Example 4 In Example 1, 4 was replaced with 1,5-bis (4-hydroxyphenylthio) -3-oxapentane in solution [B].
Comparative heat-sensitive recording paper was obtained in the same manner except that -isopropoxy-4'-hydroxydiphenylsulfone was used.
以上の様にして得た本発明の感熱記録紙並びに比較用
の感熱記録紙の品質を下記の要領で評価した。The quality of the heat-sensitive recording paper of the present invention obtained as described above and the heat-sensitive recording paper for comparison were evaluated in the following manner.
（１）動的発色性……松下電子部品（株）製薄膜ヘッド
を有する感熱印字実験装置にて、ヘッド電力0.45W/ドッ
ト、１ライン記録時間20ms/l、走査線密度８×3.85ドッ
ト/mmの条件下でパルス巾0.2、0.4、0.6、0.8、1.0msec
で印字し、その印字濃度をマクベス濃度計RD−914で測
定した。(1) Dynamic color development: Using a thermal printing tester with a thin-film head manufactured by Matsushita Electronic Components Co., Ltd., head power 0.45 W / dot, one line recording time 20 ms / l, scanning line density 8 × 3.85 dots / mm, pulse width 0.2, 0.4, 0.6, 0.8, 1.0 msec
And the print density was measured with a Macbeth densitometer RD-914.
（２）耐熱性……（１）で動的発色性を測定したサンプ
ルについて、印字濃度が1.0〜1.3のものを、60℃環境下
24時間放置した後の画像部及び地肌部の濃度を測定し
た。(2) Heat resistance: For samples whose dynamic color development was measured in (1), samples with print densities of 1.0 to 1.3 under 60 ° C environment
After standing for 24 hours, the density of the image area and the background area was measured.
（３）耐湿性……（２）と同様のサンプルについて、40
℃−90％RHの環境下24時間放置後の画像部及び地肌部の
濃度を測定した。(3) Moisture resistance: 40% for the same sample as (2)
The densities of the image area and the background area after standing for 24 hours in an environment of ° C.-90% RH were measured.
（４）耐光性……（２）と同様のサンプルについて、50
00Luxの環境下14日間放置後の画像部及び地肌部の濃度
を測定した。(4) Light fastness: 50% for the same sample as (2)
The density of the image area and the background area after being left for 14 days in an environment of 00 Lux was measured.
〔効果〕 表−１、表−２より明らかなように、本発明の感熱記
録材料は比較用の感熱記録紙に比べて動的発色性に優れ
ると共に、保存性においても優れていることがわかる。 [Effects] As is clear from Tables 1 and 2, the heat-sensitive recording material of the present invention has excellent dynamic coloring properties and excellent storage stability as compared with the comparative heat-sensitive recording paper. .
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 晃司 東京都大田区中馬込１丁目３番６号 株 式会社リコー内 (56)参考文献 特開 昭59−68295（ＪＰ，Ａ) 特開 昭59−190891（ＪＰ，Ａ) 特開 昭58−208092（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Koji Yamamoto, inventor Ricoh Co., Ltd. 1-3-6 Nakamagome, Ota-ku, Tokyo (56) References JP-A-59-68295 (JP, A) JP-A Sho 59-190891 (JP, A) JP-A-58-208092 (JP, A)
Claims (1)
とする発色層を設けた感熱記録材料において、ロイコ染
料として下記（１）式で示される物質を、顕色剤として
下記（２）式で示される物質を用いることを特徴とする
感熱記録材料。 1. A thermosensitive recording material comprising a support having thereon a color-forming layer comprising a leuco dye and a color developer as main components, wherein a substance represented by the following formula (1) is used as the leuco dye and (2) A heat-sensitive recording material using a substance represented by the formula:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63012197A JP2714591B2 (en) | 1988-01-21 | 1988-01-21 | Thermal recording material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63012197A JP2714591B2 (en) | 1988-01-21 | 1988-01-21 | Thermal recording material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01186378A JPH01186378A (en) | 1989-07-25 |
| JP2714591B2 true JP2714591B2 (en) | 1998-02-16 |
Family
ID=11798679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63012197A Expired - Fee Related JP2714591B2 (en) | 1988-01-21 | 1988-01-21 | Thermal recording material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2714591B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5968295A (en) * | 1982-10-12 | 1984-04-18 | Ricoh Co Ltd | Heat-sensitive recording material |
| JPS59190891A (en) * | 1983-04-14 | 1984-10-29 | Hodogaya Chem Co Ltd | Thermal recording material |
-
1988
- 1988-01-21 JP JP63012197A patent/JP2714591B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01186378A (en) | 1989-07-25 |
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